public IEnumerable<IEvent> Handle(MakeMove move)
{
CanMakeMove(move);
yield return new MoveMade(move.AggregateId, move.PlayerId, move.Move);
if (_state == GameState.WaitingForMove)
{
if (_latestMove.Item1 == move.Move)
{
yield return new RoundTied(_gameId);
}
else
{
var winningPlayer = GetWinning(move);
yield return new RoundWon(_gameId, winningPlayer);
if (_scores[winningPlayer] + 1 == _firstTo)
{
yield return new GameWon(_gameId, winningPlayer, OtherPlayer(winningPlayer));
}
}
}
}
string GetWinning(MakeMove move)
{
string winningPlayer = "";
switch (move.Move)
{
case Move.Paper:
winningPlayer = _latestMove.Item1 == Move.Scissors ? _latestMove.Item2 : OtherPlayer(_latestMove.Item2);
break;
case Move.Scissors:
winningPlayer = _latestMove.Item1 == Move.Rock ? _latestMove.Item2 : OtherPlayer(_latestMove.Item2);
break;
case Move.Rock:
winningPlayer = _latestMove.Item1 == Move.Paper ? _latestMove.Item2 : OtherPlayer(_latestMove.Item2);
break;
}
return winningPlayer;
}
void CanMakeMove(MakeMove move)
{
if (_state == GameState.NotCreated || _state == GameState.GameWon)
{
throw new InvalidOperationException("Invalid state");
}
if (_state == GameState.WaitingForMove)
{
if (_latestMove.Item2 == move.PlayerId)
{
throw new InvalidOperationException("Cannot make two moves...");
}
}
}